1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e2ec1291c8cf0081e4b14175b0ff2412a652be0b35ec6edba11a30cc52707c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d8e130d-086a-4b8b-bbfd-81b647736950.json and https://artists.proofprofile.net/proofs/artist/3d8e130d-086a-4b8b-bbfd-81b647736950.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b404eaa005715fe56a113a92543556b7d7abd46f032550ad7824c5e97a5429. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USRH11103431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d5bfd1387a28bd3494059d0774cdcf9b950e02c4799b46ac9efecd097f9ec5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USRH11103432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa586353ffc14216a67362f0633d9e4ea360c6885240fe8bd699b855f520669f0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USRH11103433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb3b1652e7432d0556872e1337ea18f714c93ee68bf13b4a88086171f4e5741. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USRH11103434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7b0acf880e3e29f7005a987c08436ea2db6a98e55ccd42b83fc31deea15048. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USRH11103436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c116dedc835253e1e590cb23245229d4336a025782cc2878e7384619b68ae2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USRH11103438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b74218cef1e2b11f16aea81f0b454d39c0ba98c036ff569a5ea54fd2c73b77. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USRH11103445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530835931d5fb0b1bda82cd5fb4fba9f787f5af2570b2721e064ea6046c7f2e4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USRH10403510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba6bdc56338e57408053bc8b6b834b090355e34bda8c75e836629078041b478. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USRH10403507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1393f0f1d627b1136c2ebb1e558a1fe407e431f3934078cbe835b8f6cc581057. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USRH10403508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf037be15e2d581f6575def7302e333945f2ee26743e9afb3b282ed37588d28. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTB10300200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbcb923e34f8db2c432d6be3aa2684f8decf9343a03220e2553cdfcaf24d019. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTB10300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0403a386742a06a2794d9121021fe65cc403b2e33b5014d5efed381fa94d74f7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTB10300203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8518984370a8db87884303f5736f4563131ee100daa8a2d693db00b783bac522. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTB10300204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc054b4b2e0409ce0bd1fd12d721fd4cc5a804d8f13a7ee16f662da5998abd681. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTB10300206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfacf88084644cc85267a15f6cee6c1220c0f3ee7c9c9e0405955b345c1ae468. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTB10300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c36fecd7be98cc0092c6f07455b3a6a8122ccd2163dcfc671e71dbeb8337eee. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTB10300209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd3484d1f120f0d69756a5360937190dacc37c0d23cc1394af4247604652c82. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTB10300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f94cbb6bdd8feced44f53ed36de4747ded81b458de98b98542a1d31e0e531d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTB10300211.